--- a/build-deps.sh	2020-08-01 15:23:59.795295182 +0000
+++ b/build-deps.sh	2020-08-01 15:24:40.895942577 +0000
@@ -31,8 +31,8 @@
 # cbindgen is a build-time dependency:
 ( cd $CWD/build-deps/cbindgen ; ./cbindgen.build ) || exit 1
 
-if /bin/ls build-deps*.txz 1> /dev/null 2> /dev/null ; then # use prebuilt autoconf/nodejs
-  ( cd $TMP/mozilla-thunderbird-build-deps ; tar xf $CWD/build-deps*.txz )
+if /bin/ls build-deps*${ARCH}*.txz 1> /dev/null 2> /dev/null ; then # use prebuilt autoconf/nodejs
+  ( cd $TMP/mozilla-thunderbird-build-deps ; tar xf $CWD/build-deps*${ARCH}*.txz )
 else
   # We need to use the incredibly ancient autoconf-2.13 for this  :/
   ( cd $CWD/build-deps/autoconf ; ./autoconf.build ) || exit 1